And a great hail with every stone about the weight of a talent descended out of heaven upon the men, and the men blasphemed God due to the plague of hail, because the plague of it was unusually great.”​—Revelation 16:18-21.

“A great hail,” much greater than that which afflicted Egypt during the seventh plague, with each hailstone weighing about a talent, will pummel mankind painfully.* (Exodus 9:22-26) This punishing downpour of congealed waters likely pictures unusually heavy verbal expressions of Jehovah’s judgments, signaling that the end of this system of things has arrived at last! Jehovah could well use literal hail too in his destructive work.​—Job 38:22, 23.

39. Despite the pouring out of the seven plagues, what course of action will most of humankind take?

39 Thus, Satan’s world will meet up with Jehovah’s righteous judgment. To the end, most of humankind will continue to defy and blaspheme God. As with Pharaoh of old, their hearts will not be softened by the repeated plagues or by the final death-dealing culmination of those plagues. (Exodus 11:9, 10) There will be no last-minute, large-scale change of heart. With their dying breath, they will rail against the God who declares: “They will have to know that I am Jehovah.” (Ezekiel 38:23) Nevertheless, the sovereignty of Jehovah God the Almighty will have been vindicated.